| O |
| Oannes |
| Ob |
| Obea |
| Ochema |
| Od |
| Odakon |
| Odem |
| Odin |
| Odur |
| Oeaihu |
| Ofanim |
| Ogam |
| Ogdoas |
| Ogmios |
| Ogygia |
| Okkulte Wissenschaft |
| Okkultist |
| Ökuthor |
| Olam |
| Olymp |
| Om |
| Omito-Fo |
| Omkara |
| Omorka |
| Onech |
| Onophrios |
| Ophiomorphos |
| Ophiozenen |
| Ophis |
| Ophis-Christos |
| Ophiten |
| Orai |
| Örgelmir |
| Orion |
| Orkus |
| Orlog |
| Ormazd |
| Orpheus |
| Orphische Mysterien |
| Oshadhi-prastha |
| Osiris |
| Ossa |
| Ostern |
| Otizoe |